Knee brace



FIG. 1 is a perspective view of the knee brace of the present inventionshowing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines illustrate portions of the knee brace which form nopart of the claimed design.

The ornamental design for a knee brace, as shown and described.